"I am very proud that BMLOT was invited to assist in the arrangements for the visit to the Blue Mountains by the young royal couple.

"It is a wonderful secret a very small and tight-lipped group within the official regional tourism organisation has kept faithfully for some time. Many thanks to the select group of Blue Mountains City Council staff who have worked with BMLOT on preparations for this visit," he said.

"We are delighted to now share the details with the community so royal watchers and well wishers have the chance to see Their Royal Highnesses in person.

"The Blue Mountains is one of the most recognisable, not to mention magnificent locations on the planet. It is fitting that one of the most recognisable couples in the world visit it."

The Blue Mountains has been a favourite royal tour destination for almost a century.

The Duke’s grandmother, the current monarch Her Majesty Queen Elizabeth II and The Duke of Edinburgh visited the Blue Mountains and Lithgow in 1954, their tour including Echo Point. In fact, a monument stands on the lower deck of the lookout in her honour.

The most celebrated visit was that of the then Duke and Duchess of York in March 1927.

On March 31 of that year, the royal couple arrived at Katoomba by train and walked the short distance from the railway station to The Carrington Hotel (the first resort-style hotel in Australia’s first tourist destination, the Blue Mountains).

Huge crowds greeted them. After lunch, they were driven to Echo Point, home of the Three Sisters, where thousands lined the streets.

The Echo newspaper reported that The Duchess was overheard to say: " 'Look at those clouds! Isn’t it wonderful.’ The Duke’s reply was unintelligible [unable to be heard], but his face maintained its customary passivity."

The Royal couple also visited Jenolan Caves during that tour.

NSW Premier Barry O’Farrell also welcomed The Duke and Duchess of Cambridge to the Blue Mountains, saying their visit would demonstrate that the region had recovered from the October 2013 bushfires, was open for business and a great place for a getaway.

Well wishers are advised to arrive at Echo Point between 11am and 12pm on Thursday. Further details such as the route to be taken by the royal entourage will not be disclosed